Patent US2507262A successfully refreshed from Google Patents.
US2507262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple zone control apparatus
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1945-03-09
•
Granted: 1950-05-09
•
Expires: 1965-03-09
Abstract
No abstract record available.
Inventors
- 👤 Paul V Mcgivern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:48
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1124445A
Cited
US2143251A
Cited
US2397473A
Cited
US2189703A
Cited
US2304303A
Cited
US2196664A
Cited
US2277380A
Cited
US2368428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |